Air-pressure indicator.



II. W. & e. .IL BROWN.

AIR PRESSURE INDICATOR.

f APPLICATION FILED IAN. 11, 1909.

Patented Jan.' 4, 1910.

mmm. s, GRAHAM co.. rmm-Lrrmnmml. vlammen, u. C.

.UNITED sTATEs PATENT o'EEIcE.

I-IENRY W. BROWN AND GARRETT H. BROWN, 0F SYRACUSE, NEW YORK.

AIR-PRESSURE INDICATOR.

Specification of Letters Patent.

Patented J an. 4, 1910.

Application filed January 1p1, 1909. SeriaI No. 471,683.

To all 'whomlit may concern:

Be it known that we, HENRY W. BROWN and GARRETT H. BROWN, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in` Air-Pressure Indicators, of

which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improve# ments in air pressure indicators adapted to be placed in the connection between an air compressor and pneumatic tire of automobiles and similarv vehicles in which inflated tires or tire sections are employed.

Our main object is `to produce a pressure and permanently or detachably connected to the end `of a flexible hose leading to an air compressor of a reservoir or pump 1n which the compressed air has been stored.

Ve are aware that it is not new to connect a `pressure register directly to the nipple vof' a tire but one of the specific objects of our present invention is to provide the registering device with a valve and a casing there l for, which latter is rotatable bodily in the base of the registering device, and adapted i to be screwed `directly into the nipple of the 1 tire.

Another object is to provide this same valve casing with means whereby the valve in the tire nipple will be automatically vopened by the, operation of screwing the valve casing into the nipple, the latter operation being effected without rotating' the indicator or` adjusting any of the other parts of the registeringdevice. p

A further `object is to enable the valve casing to be removed from the base of the indicator and replaced by a new one without the removal `of any of the other parts.

Other objects and uses will appear in the following description.

In the drawings Figurel is a face view of our improved registering device shown as operatively connected `to a` portion of a pneumatic tire` and topa flexible hose, thelatter beingadapted to be connected to an air pump or other` source of supply for compressed air.` Fig. AQ ;is a longitudinal sec` tional view taken on `line Q Q, Fig. l. Fig. i 3 is an enlarged `sectional view taken on` line 3 3, Fig. Q. Fig. 4 is a rear elevation p of the detached registering device and Fig. l

5 is a sectional view taken on ,line 4 4, Fig. Q.

This pressure register comprises an ordinary pressure indicator 1 which is screwed into a suitable base Q having a lengthwise opening 3 therethrough in which is journaled a rotary valve casing las best seen in Fig. Q. This valve casing extends entirely through the opposite ends ofthe base Q and is provided at one endl with a threadedextension 5 wholly exterior to the base Q and adapted to be screwed into the usual tire nipple a of a tire A a suitable packing ring or washer G being interposed between the end of the tire nipple ca and adjacent face of the indicator base Q and surrounds the adjacent portion of the valve casing 4 to prevent leakage of air at this joint. The opposite end of the valve casing which extends beyond the adjacent side of the base Q is also threaded for receiving a threaded coupling 7 the latter being rotatably interlo'cked with a coupling 8- which in turn is secured to one end of a flexible hose or pipe B The rotatable connection between the coupling sections 7 and 8 is established by providing the section 8 with an annular flange Q and crimping the adjacent end of the section 7 inwardly around the liange 9 thus forming an annular groove 10 in the adjacent end of the section 7 iii which the liange Q is loosely seated to permit the latter section 7 to be screwed upon the adjacent end of the valve casing twithout rotating the flexible hose B a suitable packing 11 being interposed in the joint bctween the liange 9 and outer side of the groove l0 before such crimping to prevent leakage of the air therethrough.

The valve casing l is provided with a lengthwise passage extending therethrough from end to end and the portion of the valve casing which extends through the base Q is provided with a lateral radial branch passage 1Q communicating with an annular groove l3 in the periphery of the valve casing, saidgroove being registered with a branch passage M in the base Q to establish communication between the interior of the valve casing and pressure indicator 1 In cutting the annular groove 13 in the periphery of the valve casing to register with the branch passage -12-, opposite annular shoulders -16- and -17- are formed, one of which as the shoulder 16- is engaged by a limiting stop consisting, in this instance, of a screw -18- screwed into the rear side of the base 2- to prevent accidental withdrawal of the valve casing from said base and at the same time Aby simply unscrewing the screw -18- a sufficient distance to clear the opening -3-, said valve casing may be readily withdrawn from the casing -2- for repairs or replacement by a new one if necessary.

A considerable portion of the valve casing within the base 9J- is fitted with an easy turning lit in the opening -8- to permit said valve casing to be readily turned or rotated in said base when connecting the device to the tire nipple as previously described.

The portion of the valve casing at the end of the base 2* opposite to that nearest the tire is provided with an annular enlargement -19- which is preferably knurled to form a convenient hand gripping surface whereby the valve casing may be turned in the base -2- in attaching the device to the nipple -a-, a suitable packing 20- being interposed between the contiguous faces of the enlargement -1$9- and base 2- to prevent leakage of the air at this joint. It is now clear that by screwing the threaded nipple -5- of the valve casing into the tire nipple -c, the entire device will be drawn upward toward the tire until the end of the tire nipple engages the packing -6- and by continued screwing, the packings -6- and -20- will be drawn up tightly to prevent leakage at these joints.

Located within the tire nipple -ais the usual valve -0- which is normally forced against a seat cZ by the usual spring -cwhen the registering device is disconnected from the tire, said valve seat being formed upon the inner end of the usual adj ustable sleeve or bushing -flocated within the tire nipple -a.

The valve -cis provided with the usual outwardly extending stem -gwhich normally projects outwardly a sufficient distance beyond the bushing -fto be engaged by a stem -22- in the adjacent end of the valve casing *4- when the latter is operatively connected to the tire nipple in the manner shown in Fig. 3. This valve operating stem -22- extends from the nipple 5 some distance beyond the branch passage -12- and is of somewhat smaller diameter than the opening through which it passes to permit free passage of the air through the valve casing to the tire and also to the indicator -1-, the inner end of said valve stem -22- being provided with a pin -23 which is forced against a shoulder 24- inthe valve casmg by a spring --25-, the latter being of greater power than the spring -Ieso as to open the tire valve -cagainst the action of this spring -cwhen the pressurey and shoulder -2G-- on the interior of the A valve 27.- is located in the valve casing -4- some distance beyond the indicator base -2- and is normally forced against a seat 28- loy a spring 2Q- which is interposed between the shoulder 2G- and adjacent end of the valve -27-.

The valve seat 28- is formed on the inner end of a bushing -30- which is screwed into the end of the valve casing 4- and has a central opening' therethrough for the reception of the stem 31H of the valve -27- whereby said valve -27- may be opened from the outer end of the valve casing when the coupling 7- is disconnected. y

In operation assuming that the flexible hose B- is connected to the source of supply for compressed air Aand that the coupling -7- is connected ,'to the valve casing -4 which latter is attached to the valve nipple aof the tire during which latter' operation the valve will be opened by the stem or spindle -22-- Now by allowing the compressed air to flow through the flexible hose B it will automatically open the valve -27- and pass entirely through the casing into the tire and also into the pressure indicator -1- through the branch passages -12- and -14- thereby inflating the tire and at the same time indicating the pressure of the air in such tire. As soon as the tire is inflated to the desired degree of pressure, the valve casing -tis unscrewed from the tire nipple -aallowing the valve -cto be closed by the spring -ewhereupon the source of supply of air may be shut olf from communication with the valve casing 4 by any well known shut-oil device not necessary to herein illustrate or describe and the valve casing together with the indicator may remain connected to the flexible hose b and may be readily detached therefrom by simply unscrewing the coupling -7-.

What we claim is:

1. In a pressure register for pneumatic tires, a pressure indicating device and su port therefor, a valve casing rotatab y mounted in and extending entirely through said support and having a threaded nipple at one end for connection with the tire nipple, and its other end provided with means for connection with the source of supply for the compressed air, said valve casing and base being provided with communicating passages leading to the indicator, and a check valve in said valve casing.

`2. `In combination with the valve nipple and valve of apneumatic tire, a pressure indicator and supporting base therefor, a valve casing rotatable in and extending entirely through the base and connected to the tire nipple, said valve casing and base having connected passages communicating with the pressure indicator, a check valve in the valve casing, yielding means in the valve casing for openingthe valve in the tire nipple as said casing is connected thereto, and movable means for retaining the valve casing in the base against endwise movement.

3. In a pressure registering device for pneumatic tires, in combination with the valve nipple of the tire, a base having a lengthwise opening therethrough and a radial branch passage leading from said opening, a pressure indicator secured directly to said branch passage, a valve casing journaled in said lengthwise opening and extending beyond the opposite ends thereof, the innerend of the casing being screwthreaded and engaged with the valve nipple, a checkvalve in the outer end of the valve casing, a spring for closing the check valve,

pneumatic tires in combination with the valve nipple of the tire, a pressure indicator and supporting base therefor, a valve casing journaled in and extending entirely through and beyond the opposite ends of the base and" having one end screwed into said tire nipple, said valve casing being removable endwise from the j ournaled opening in the base and provided with a branch opening com municating with the indicator, and movable means for holding the valve casing against endwise movement in the base.

In witness whereof we have hereunto set our hands this 10th day of December, 1908.

HENRY W. BROWN. GARRETI H. BROWN.

lVitnesses:

H. E. CHASE, HOWARD P. DENIsoN. 

